The Red Sox also held Victorino out of games so he could go through a conditioning program designed to strengthen his lower back, groin and leg muscles.

Because Victorino played on Saturday, he cannot be activated until April 14 and will miss at least 13 games. Manager John Farrell said Monday Victorino has a Grade 1 strain, which is the least serious. Victorino is expected to rejoin his teammates in Baltimore, but he could return to Boston for treatment.

Victorino won a Gold Glove in right field last season and hit .294 with 15 home runs, 61 RBIs and 21 stolen bases. He was on the disabled list from May 21 to June 7 with a strained left hamstring.

Bradley hit .189 in 37 major league games last season. He was competing with Grady Sizemore for the starting center fielder position in spring training but was 9 of 57 (.158) over 19 games and was optioned to Pawtucket on Friday.

The Red Sox are starting Daniel Nava in right field on Monday in their season opener in Baltimore. He has only 53 career starts in right field for his career, all but two of them coming last season.